The pixel art ain't great. Pieces of it are nice, i.e. the player, but beyond that all I can call it is functional. More functional than the tutorial. Took me a minute to figure out what the floating garbage in the sky meant, and by then I had guessed all the controls anyway. As well, it felt like I had to have already figured things out before I was told how to do them, unless I was expected to perform several frame-perfect jumps in a row in the brokenly high-sensitivity platforming.
Beyond that, the idea is decent, but the level design doesn't do much with it. It feels like the only use for the breaking/building mechanic is to subvert the given level, rather than to actually solve problems within it.